From patchwork Wed Aug 13 15:34:33 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gabriel FERNANDEZ X-Patchwork-Id: 4719621 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id A8F9C9F375 for ; Wed, 13 Aug 2014 15:38:50 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E1EC72015A for ; Wed, 13 Aug 2014 15:38:48 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1AC14201BC for ; Wed, 13 Aug 2014 15:38:47 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XHabm-000095-N7; Wed, 13 Aug 2014 15:37:02 +0000 Received: from mx07-00178001.pphosted.com ([62.209.51.94]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XHaaw-0007hx-Hb for linux-arm-kernel@lists.infradead.org; Wed, 13 Aug 2014 15:36:12 +0000 Received: from pps.filterd (m0046670.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.14.5/8.14.5) with SMTP id s7DFZ7DH006573; Wed, 13 Aug 2014 17:35:07 +0200 Received: from beta.dmz-us.st.com (beta.dmz-us.st.com [167.4.1.35]) by mx07-00178001.pphosted.com with ESMTP id 1nqemvytcd-1 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Wed, 13 Aug 2014 17:35:07 +0200 Received: from zeta.dmz-us.st.com (ns4.st.com [167.4.16.71]) by beta.dmz-us.st.com (STMicroelectronics) with ESMTP id 7A2522B; Wed, 13 Aug 2014 15:35:04 +0000 (GMT) Received: from mail7.sgp.st.com (unknown [164.129.223.81]) by zeta.dmz-us.st.com (STMicroelectronics) with ESMTP id 7E9684D; Wed, 13 Aug 2014 15:35:01 +0000 (GMT) Received: from lmenx315.lme.st.com ([10.201.19.41]) by mail7.sgp.st.com (MOS 4.3.3-GA) with ESMTP id BZR20264 (AUTH frq07381); Wed, 13 Aug 2014 17:34:54 +0200 From: Gabriel FERNANDEZ To: Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Srinivas Kandagatla , Maxime Coquelin , Patrice Chotard , Russell King , Kishon Vijay Abraham I , Grant Likely Subject: [PATCH 3/5] phy: miphy28lp: Provide support for the MiPHY28lp Generic PHY Date: Wed, 13 Aug 2014 17:34:33 +0200 Message-Id: <1407944075-8093-4-git-send-email-gabriel.fernandez@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1407944075-8093-1-git-send-email-gabriel.fernandez@linaro.org> References: <1407944075-8093-1-git-send-email-gabriel.fernandez@linaro.org> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.12.52, 1.0.27, 0.0.0000 definitions=2014-08-13_05:2014-08-13, 2014-08-13, 1970-01-01 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140813_083611_306553_2677908D X-CRM114-Status: GOOD ( 23.28 ) X-Spam-Score: -0.7 (/) Cc: devicetree@vger.kernel.org, alexandre torgue , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Giuseppe Cavallaro , Gabriel Fernandez , kernel@stlinux.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The MiPHY28lp is a Generic PHY which can serve various SATA or PCIe or USB3 devices. Signed-off-by: alexandre torgue Signed-off-by: Giuseppe Cavallaro Signed-off-by: Gabriel Fernandez --- drivers/phy/Kconfig | 8 + drivers/phy/Makefile | 1 + drivers/phy/phy-miphy28lp.c | 736 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 745 insertions(+) create mode 100644 drivers/phy/phy-miphy28lp.c diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 0dd7427..2053f72 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -230,4 +230,12 @@ config PHY_XGENE help This option enables support for APM X-Gene SoC multi-purpose PHY. +config PHY_MIPHY28LP + tristate "STMicroelectronics MIPHY28LP PHY driver for STiH407" + depends on ARCH_STI + depends on GENERIC_PHY + help + Enable this to support the miphy transceiver (for SATA/PCIE/USB3) + that is part of STMicroelectronics STiH407 SoC. + endmenu diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 95c69ed..f7e7c59 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_BCM_KONA_USB2_PHY) += phy-bcm-kona-usb2.o obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o obj-$(CONFIG_PHY_MVEBU_SATA) += phy-mvebu-sata.o +obj-$(CONFIG_PHY_MIPHY28LP) += phy-miphy28lp.o obj-$(CONFIG_PHY_MIPHY365X) += phy-miphy365x.o obj-$(CONFIG_OMAP_CONTROL_PHY) += phy-omap-control.o obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o diff --git a/drivers/phy/phy-miphy28lp.c b/drivers/phy/phy-miphy28lp.c new file mode 100644 index 0000000..767614c --- /dev/null +++ b/drivers/phy/phy-miphy28lp.c @@ -0,0 +1,736 @@ +/* + * Copyright (C) 2014 STMicroelectronics + * + * STMicroelectronics PHY driver MiPHY28lp (for SoC STiH407). + * + * Author: Alexandre Torgue + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2, as + * published by the Free Software Foundation. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +/* MiPHY registers */ +#define MIPHY_STATUS_1 0x02 +#define MIPHY_PHY_RDY 0x01 +#define MIPHY_PLL_HFC_RDY 0x06 +#define MIPHY_COMP_FSM_6 0x3f +#define MIPHY_COMP_DONE 0x80 + +#define MIPHY_CTRL_REG 0x04 +#define MIPHY_PX_RX_POL BIT(5) + +/* + * On STiH407 the glue logic can be different among MiPHY devices; for example: + * MiPHY0: OSC_FORCE_EXT means: + * 0: 30MHz crystal clk - 1: 100MHz ext clk routed through MiPHY1 + * MiPHY1: OSC_FORCE_EXT means: + * 1: 30MHz crystal clk - 0: 100MHz ext clk routed through MiPHY1 + * Some devices have not the possibility to check if the osc is ready. + */ +#define MIPHY_OSC_FORCE_EXT BIT(3) +#define MIPHY_OSC_RDY BIT(5) + +#define MIPHY_CTRL_MASK 0xf +#define MIPHY_CTRL_DEFAULT 0 +#define MIPHY_CTRL_SYNC_D_EN BIT(2) + +/* SATA / PCIe defines */ +#define SATA_CTRL_MASK 0x7 +#define PCIE_CTRL_MASK 0xff +#define SATA_CTRL_SELECT_SATA 1 +#define SATA_CTRL_SELECT_PCIE 0 +#define SYSCFG_PCIE_PCIE_VAL 0x80 +#define SATA_SPDMODE 1 + +struct miphy28lp_phy { + struct phy *phy; + struct miphy28lp_dev *phydev; + void __iomem *base; + void __iomem *pipebase; + + bool osc_force_ext; + bool osc_rdy; + bool px_rx_pol_inv; + + struct reset_control *miphy_rst; + + u32 sata_gen; + + /* Sysconfig registers offsets needed to configure the device */ + u32 syscfg_miphy_ctrl; + u32 syscfg_miphy_status; + u32 syscfg_pci; + u32 syscfg_sata; + u8 type; +}; + +struct miphy28lp_dev { + struct device *dev; + struct regmap *regmap; + struct mutex miphy_mutex; + struct miphy28lp_phy **phys; +}; + +struct miphy_initval { + u16 reg; + u16 val; +}; + +enum miphy_sata_gen { SATA_GEN1, SATA_GEN2, SATA_GEN3 }; + +static char *miphy_type_name[] = { "sata-up", "pcie-up", "usb3-up" }; + +static const struct miphy_initval miphylp28_initvals_sata[] = { + /* Putting Macro in reset */ + {0x00, 0x01}, {0x00, 0x03}, + /* Wait for a while */ + {0x00, 0x01}, {0x04, 0x1c}, + /* PLL calibration */ + {0xeb, 0x1d}, {0x0d, 0x1e}, {0x0f, 0x00}, + /* Writing The PLL Ratio */ + {0xd4, 0xc8}, {0xd5, 0x00}, {0xd6, 0x00}, {0xd7, 0x00}, + {0xd3, 0x00}, {0x0f, 0x02}, {0x0e, 0x0a}, {0x0f, 0x01}, + {0x0e, 0x0a}, {0x0f, 0x00}, {0x0e, 0x0a}, {0x4e, 0xd1}, + {0x4e, 0xd1}, + /* Rx Calibration */ + {0x99, 0x1f}, {0x0a, 0x41}, {0x7a, 0x0d}, {0x7f, 0x7d}, + {0x80, 0x56}, {0x81, 0x00}, {0x7b, 0x00}, {0xc1, 0x01}, + {0xc2, 0x01}, {0x97, 0xf3}, {0xc9, 0x02}, {0xca, 0x02}, + {0xcb, 0x02}, {0xcc, 0x0a}, {0x9d, 0xe5}, {0x0f, 0x00}, + {0x0e, 0x02}, {0x0e, 0x00}, {0x63, 0x00}, {0x64, 0xaf}, + {0x0f, 0x00}, {0x49, 0x07}, {0x0f, 0x01}, {0x49, 0x07}, + {0x0f, 0x02}, {0x49, 0x07}, {0x0f, 0x03}, {0x49, 0x07}, + {0x0f, 0x00}, {0x4a, 0x50}, {0x4a, 0x53}, {0x4b, 0x00}, + {0x4b, 0x00}, {0x0f, 0x01}, {0x0e, 0x04}, {0x0e, 0x05}, + {0x63, 0x00}, {0x64, 0xae}, {0x0f, 0x00}, {0x49, 0x07}, + {0x0f, 0x01}, {0x49, 0x07}, {0x0f, 0x02}, {0x49, 0x07}, + {0x0f, 0x03}, {0x49, 0x07}, {0x0f, 0x01}, {0x4a, 0x73}, + {0x4a, 0x72}, {0x4b, 0x20}, {0x4b, 0x20}, {0x0f, 0x02}, + {0x0e, 0x09}, {0x0e, 0x0a}, {0x63, 0x00}, {0x64, 0xae}, + {0x0f, 0x00}, {0x49, 0x07}, {0x0f, 0x01}, {0x49, 0x07}, + {0x0f, 0x02}, {0x49, 0x07}, {0x0f, 0x03}, {0x49, 0x07}, + {0x0f, 0x02}, {0x4a, 0xc2}, {0x4a, 0xc0}, {0x4b, 0x20}, + {0x4b, 0x20}, {0xcd, 0x21}, {0xcd, 0x21}, {0x00, 0x00}, + {0x00, 0x01}, {0x00, 0x00}, {0x01, 0x04}, {0x01, 0x05}, + {0xe9, 0x00}, {0x0d, 0x1e}, {0x3a, 0x40}, {0x01, 0x01}, + {0x01, 0x00}, {0xe9, 0x40}, {0x0a, 0x41}, {0x0f, 0X00}, + {0x0b, 0x00}, {0x0b, 0x00}, {0x62, 0x00}, {0x0f, 0x00}, + {0xe3, 0x02}, {0xe3, 0x02}, {0x26, 0x27}, {0x26, 0x00}, + {0x26, 0x62}, {0x26, 0x00}, {0x0f, 0x00}, {0x0f, 0x01}, + {0x0f, 0x02}, {0x0f, 0x00}, +}; + +static const struct miphy_initval miphylp28_initvals0_pcie[] = { + /* Putting Macro in reset */ + {0x00, 0x01}, {0x00, 0x03}, + /* Wait for a while */ + {0x00, 0x01}, {0x04, 0x14}, {0xeb, 0x1d}, {0x0d, 0x1e}, + {0xd4, 0xa6}, {0xd5, 0xaa}, {0xd6, 0xaa}, {0xd7, 0x00}, + {0xd3, 0x00}, {0x0a, 0x40}, {0x4e, 0xd1}, {0x99, 0x5f}, + {0x0f, 0x00}, {0x0e, 0x05}, {0x63, 0x00}, {0x64, 0xa5}, + {0x49, 0x07}, {0x4a, 0x71}, {0x4b, 0x60}, {0x78, 0x98}, + {0x7a, 0x0d}, {0x7b, 0x00}, {0x7f, 0x79}, {0x80, 0x53}, + {0x0f, 0x01}, {0x0e, 0x0a}, {0x63, 0x00}, {0x64, 0xa5}, + {0x49, 0x07}, {0x4a, 0x70}, {0x4b, 0x60}, {0x78, 0x9c}, + {0x7a, 0x0d}, {0x7b, 0x00}, {0x7f, 0x79}, {0x80, 0x6a}, + {0xcd, 0x21}, {0x00, 0x00}, {0x01, 0x05}, {0xe9, 0x00}, + {0x0d, 0x1e}, {0x3a, 0x40}, +}; + +static const struct miphy_initval miphylp28_initvals1_pcie[] = { + {0x01, 0x01}, {0x01, 0x00}, + {0xe9, 0x40}, {0xe3, 0x02}, +}; + +static const struct miphy_initval miphylp28_initvals_usb3[] = { + /* Putting Macro in reset */ + {0x00, 0x01}, {0x00, 0x03}, + /* Wait for a while */ + {0x00, 0x01}, {0x04, 0x1c}, + /* PLL calibration */ + {0xeb, 0x1d}, {0x0d, 0x1e}, {0x0f, 0x00}, {0xc4, 0x70}, + {0xc9, 0x02}, {0xca, 0x02}, {0xcb, 0x02}, {0xcc, 0x0a}, + /* Writing The PLL Ratio */ + {0xd4, 0xa6}, {0xd5, 0xaa}, {0xd6, 0xaa}, {0xd7, 0x04}, + {0xd3, 0x00}, + /* Writing The Speed Rate */ + {0x0f, 0x00}, {0x0e, 0x0a}, + /* RX Channel compensation and calibration */ + {0xc2, 0x1c}, {0x97, 0x51}, {0x98, 0x70}, {0x99, 0x5f}, + {0x9a, 0x22}, {0x9f, 0x0e}, + + {0x7a, 0x05}, {0x7f, 0x78}, {0x30, 0x1b}, + /* Enable GENSEL_SEL and SSC */ + /* TX_SEL=0 swing preemp forced by pipe registres */ + {0x0a, 0x11}, + /* MIPHY Bias boost */ + {0x63, 0x00}, {0x64, 0xa7}, + /* TX compensation offset to re-center TX impedance */ + {0x42, 0x02}, + /* SSC modulation */ + {0x0C, 0x04}, + /* MIPHY TX control */ + {0x0f, 0x00}, {0xe5, 0x5a}, {0xe6, 0xA0}, {0xe4, 0x3c}, + {0xe6, 0xa1}, {0xe3, 0x00}, {0xe3, 0x02}, {0xe3, 0x00}, + /* Rx PI controller settings */ + {0x78, 0xca}, + /* MIPHY RX input bridge control */ + /* INPUT_BRIDGE_EN_SW=1, manual input bridge control[0]=1 */ + {0xcd, 0x21}, {0xcd, 0x29}, {0xce, 0x1a}, + /* MIPHY Reset */ + {0x00, 0x01}, {0x00, 0x00}, {0x01, 0x04}, {0x01, 0x05}, + {0xe9, 0x00}, {0x0d, 0x1e}, {0x3a, 0x40}, {0x01, 0x01}, + {0x01, 0x00}, {0xe9, 0x40}, {0x0f, 0x00}, {0x0b, 0x00}, + {0x62, 0x00}, {0x0f, 0x00}, {0xe3, 0x02}, {0x26, 0xa5}, + {0x0f, 0x00}, +}; + +static void miphy_write_initvals(struct miphy28lp_phy *miphy_phy, + const struct miphy_initval *initvals, + int count) +{ + struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; + int i; + + for (i = 0; i < count; i++) { + dev_dbg(miphy_dev->dev, "MiPHY28LP reg: 0x%x=0x%x\n", + initvals[i].reg, initvals[i].val); + if (i == 2) + usleep_range(10, 20); /* extra delay after resetting */ + writeb_relaxed(initvals[i].val, + miphy_phy->base + initvals[i].reg); + } +} + +static inline int miphy_is_ready(struct miphy28lp_phy *miphy_phy) +{ + unsigned long finish = jiffies + 5 * HZ; + u8 mask = MIPHY_PLL_HFC_RDY; + u8 val; + + /* + * For PCIe and USB3 check only that PLL and HFC are ready + * For SATA check also that phy is ready! + */ + if (miphy_phy->type == MIPHY_TYPE_SATA) + mask |= MIPHY_PHY_RDY; + + do { + val = readb_relaxed(miphy_phy->base + MIPHY_STATUS_1); + if ((val & mask) != mask) + cpu_relax(); + else + return 0; + } while (!time_after_eq(jiffies, finish)); + + return -EBUSY; +} + +static int miphy_osc_is_ready(struct miphy28lp_phy *miphy_phy) +{ + struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; + unsigned long finish = jiffies + 5 * HZ; + u32 val; + + if (!miphy_phy->osc_rdy) + return 0; + + if (!miphy_phy->syscfg_miphy_status) + return -EINVAL; + + do { + regmap_read(miphy_dev->regmap, miphy_phy->syscfg_miphy_status, + &val); + + if ((val & MIPHY_OSC_RDY) != MIPHY_OSC_RDY) + cpu_relax(); + else + return 0; + } while (!time_after_eq(jiffies, finish)); + + return -EBUSY; +} + +static int miphy28lp_get_ressource_byname(struct device_node *child, + char *name, struct resource *res) +{ + int index, ret = 0, count = 0; + int reg_tuple_size; + const __be32 *p; + + reg_tuple_size = (of_n_addr_cells(child) + + of_n_size_cells(child)) * sizeof(u32); + + p = of_get_property(child, "reg", &count); + if (count % reg_tuple_size != 0) + ret = -EINVAL; + + count /= reg_tuple_size; + + for (index = 0; index < count; index++) { + const char *rname = NULL; + + ret = of_property_read_string_index(child, "reg-names", + index, &rname); + if (!strcmp(name, rname)) + return of_address_to_resource(child, index, res); + } + + return 1; +} + +static int miphy28lp_get_one_addr(struct device *dev, + struct device_node *child, char *rname, + void __iomem **base) +{ + struct resource res; + int ret; + + ret = miphy28lp_get_ressource_byname(child, rname, &res); + if (!ret) { + *base = devm_ioremap(dev, res.start, resource_size(&res)); + if (!*base) { + dev_err(dev, "failed to ioremap %s address region\n" + , rname); + return -ENOENT; + } + } + + return 0; +} + +/* MiPHY reset and sysconf setup */ +static int miphy28lp_setup(struct miphy28lp_phy *miphy_phy, u32 miphy_val) +{ + int err; + struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; + + if (!miphy_phy->syscfg_miphy_ctrl) + return -EINVAL; + + err = reset_control_assert(miphy_phy->miphy_rst); + if (err) { + dev_err(miphy_dev->dev, "unable to bring out of miphy reset\n"); + return err; + } + + if (miphy_phy->osc_force_ext) + miphy_val |= MIPHY_OSC_FORCE_EXT; + + regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_miphy_ctrl, + MIPHY_CTRL_MASK, miphy_val); + + err = reset_control_deassert(miphy_phy->miphy_rst); + if (err) { + dev_err(miphy_dev->dev, "unable to bring out of miphy reset\n"); + return err; + } + + return miphy_osc_is_ready(miphy_phy); +} + +static int miphy28lp_init_sata(struct miphy28lp_phy *miphy_phy) +{ + struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; + int count, err, sata_conf = SATA_CTRL_SELECT_SATA; + u8 val; + + if ((!miphy_phy->syscfg_sata) || (!miphy_phy->syscfg_pci) + || (!miphy_phy->base)) + return -EINVAL; + + dev_info(miphy_dev->dev, "sata-up mode, addr 0x%p\n", miphy_phy->base); + + /* Configure the glue-logic */ + sata_conf |= ((miphy_phy->sata_gen - SATA_GEN1) << SATA_SPDMODE); + + regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_sata, + SATA_CTRL_MASK, sata_conf); + + regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_pci, + PCIE_CTRL_MASK, SATA_CTRL_SELECT_PCIE); + + /* MiPHY path and clocking init */ + err = miphy28lp_setup(miphy_phy, MIPHY_CTRL_DEFAULT); + + if (err) { + dev_err(miphy_dev->dev, "SATA phy setup failed\n"); + return err; + } + + /* initialize miphy */ + count = ARRAY_SIZE(miphylp28_initvals_sata); + miphy_write_initvals(miphy_phy, miphylp28_initvals_sata, count); + + if (miphy_phy->px_rx_pol_inv) { + /* Invert Rx polarity */ + val = readb_relaxed(miphy_phy->base + MIPHY_CTRL_REG); + val |= MIPHY_PX_RX_POL; + writeb_relaxed(val, miphy_phy->base + MIPHY_CTRL_REG); + } + + return miphy_is_ready(miphy_phy); +} + +static int miphy28lp_init_pcie(struct miphy28lp_phy *miphy_phy) +{ + struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; + unsigned long finish = jiffies + 5 * HZ; + int count, err; + u8 val; + + if ((!miphy_phy->syscfg_sata) || (!miphy_phy->syscfg_pci) + || (!miphy_phy->base) || (!miphy_phy->pipebase)) + return -EINVAL; + + dev_info(miphy_dev->dev, "pcie-up mode, addr 0x%p\n", miphy_phy->base); + + /* Configure the glue-logic */ + regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_sata, + SATA_CTRL_MASK, SATA_CTRL_SELECT_PCIE); + + regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_pci, + PCIE_CTRL_MASK, SYSCFG_PCIE_PCIE_VAL); + + /* MiPHY path and clocking init */ + err = miphy28lp_setup(miphy_phy, MIPHY_CTRL_DEFAULT); + + if (err) { + dev_err(miphy_dev->dev, "PCIe phy setup failed\n"); + return err; + } + + count = ARRAY_SIZE(miphylp28_initvals0_pcie); + miphy_write_initvals(miphy_phy, miphylp28_initvals0_pcie, count); + + /* extra delay to wait pll lock */ + usleep_range(100, 120); + + count = ARRAY_SIZE(miphylp28_initvals1_pcie); + miphy_write_initvals(miphy_phy, miphylp28_initvals1_pcie, count); + + /* Waiting for Compensation to complete */ + do { + val = readb_relaxed(miphy_phy->base + MIPHY_COMP_FSM_6); + if (time_after_eq(jiffies, finish)) + return -EBUSY; + cpu_relax(); + } while (!(val & MIPHY_COMP_DONE)); + + /* PIPE Wrapper Configuration */ + writeb_relaxed(0x68, miphy_phy->pipebase + 0x104); /* Rise_0 */ + writeb_relaxed(0x61, miphy_phy->pipebase + 0x105); /* Rise_1 */ + writeb_relaxed(0x68, miphy_phy->pipebase + 0x108); /* Fall_0 */ + writeb_relaxed(0x61, miphy_phy->pipebase + 0x109); /* Fall-1 */ + writeb_relaxed(0x68, miphy_phy->pipebase + 0x10c); /* Threshhold_0 */ + writeb_relaxed(0x60, miphy_phy->pipebase + 0x10d); /* Threshold_1 */ + + /* Wait for phy_ready */ + return miphy_is_ready(miphy_phy); +} + +static int miphy28lp_init_usb3(struct miphy28lp_phy *miphy_phy) +{ + struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; + int count, err; + + if ((!miphy_phy->base) || (!miphy_phy->pipebase)) + return -EINVAL; + + dev_info(miphy_dev->dev, "usb3-up mode, addr 0x%p\n", miphy_phy->base); + + /* MiPHY path and clocking init */ + err = miphy28lp_setup(miphy_phy, MIPHY_CTRL_SYNC_D_EN); + + if (err) { + dev_err(miphy_dev->dev, "USB3 phy setup failed\n"); + return err; + } + + count = ARRAY_SIZE(miphylp28_initvals_usb3); + miphy_write_initvals(miphy_phy, miphylp28_initvals_usb3, count); + + /* PIPE Wrapper Configuration */ + writeb_relaxed(0x68, miphy_phy->pipebase + 0x23); + writeb_relaxed(0x61, miphy_phy->pipebase + 0x24); + writeb_relaxed(0x68, miphy_phy->pipebase + 0x26); + writeb_relaxed(0x61, miphy_phy->pipebase + 0x27); + writeb_relaxed(0x18, miphy_phy->pipebase + 0x29); + writeb_relaxed(0x60, miphy_phy->pipebase + 0x2a); + + /* pipe Wrapper usb3 TX swing de-emph margin PREEMPH[7:4], SWING[3:0] */ + writeb_relaxed(0X67, miphy_phy->pipebase + 0x68); + writeb_relaxed(0x0d, miphy_phy->pipebase + 0x69); + writeb_relaxed(0X67, miphy_phy->pipebase + 0x6a); + writeb_relaxed(0X0d, miphy_phy->pipebase + 0x6b); + writeb_relaxed(0X67, miphy_phy->pipebase + 0x6c); + writeb_relaxed(0X0d, miphy_phy->pipebase + 0x6d); + writeb_relaxed(0X67, miphy_phy->pipebase + 0x6e); + writeb_relaxed(0X0d, miphy_phy->pipebase + 0x6f); + + return miphy_is_ready(miphy_phy); +} + +static int miphy28lp_init(struct phy *phy) +{ + struct miphy28lp_phy *miphy_phy = phy_get_drvdata(phy); + struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; + int ret; + + mutex_lock(&miphy_dev->miphy_mutex); + + switch (miphy_phy->type) { + + case MIPHY_TYPE_SATA: + ret = miphy28lp_init_sata(miphy_phy); + break; + case MIPHY_TYPE_PCIE: + ret = miphy28lp_init_pcie(miphy_phy); + break; + case MIPHY_TYPE_USB: + ret = miphy28lp_init_usb3(miphy_phy); + break; + default: + return -EINVAL; + } + + mutex_unlock(&miphy_dev->miphy_mutex); + + return ret; +} + + +static int miphy28lp_get_addr(struct miphy28lp_phy *miphy_phy) +{ + struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; + struct device_node *phynode = miphy_phy->phy->dev.of_node; + int err; + + if (!miphy_phy->type || (miphy_phy->type > MIPHY_TYPE_USB)) + return -EINVAL; + + err = miphy28lp_get_one_addr(miphy_dev->dev, phynode, + miphy_type_name[miphy_phy->type - MIPHY_TYPE_SATA], + &miphy_phy->base); + if (err) + return err; + + if ((miphy_phy->type == MIPHY_TYPE_PCIE) || + (miphy_phy->type == MIPHY_TYPE_USB)) { + err = miphy28lp_get_one_addr(miphy_dev->dev, phynode, "pipew", + &miphy_phy->pipebase); + if (err) + return err; + } + + return 0; +} + +static struct phy *miphy28lp_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct miphy28lp_dev *miphy_dev = dev_get_drvdata(dev); + struct miphy28lp_phy *miphy_phy = NULL; + struct device_node *phynode = args->np; + int ret, index = 0; + + if (!of_device_is_available(phynode)) { + dev_warn(dev, "Requested PHY is disabled\n"); + return ERR_PTR(-ENODEV); + } + + if (args->args_count != 1) { + dev_err(dev, "Invalid number of cells in 'phy' property\n"); + return ERR_PTR(-EINVAL); + } + + for (index = 0; index < of_get_child_count(dev->of_node); index++) + if (phynode == miphy_dev->phys[index]->phy->dev.of_node) { + miphy_phy = miphy_dev->phys[index]; + break; + } + + if (!miphy_phy) { + dev_err(dev, "Failed to find appropriate phy\n"); + return ERR_PTR(-EINVAL); + } + + miphy_phy->type = args->args[0]; + + ret = miphy28lp_get_addr(miphy_phy); + if (ret < 0) + return ERR_PTR(ret); + + return miphy_phy->phy; +} + +static struct phy_ops miphy28lp_ops = { + .init = miphy28lp_init, + .owner = THIS_MODULE, +}; + +static int miphy28lp_probe_resets(struct device_node *node, + struct miphy28lp_phy *miphy_phy) +{ + struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; + int err; + + miphy_phy->miphy_rst = of_reset_control_get(node, "miphy-sw-rst"); + + if (IS_ERR(miphy_phy->miphy_rst)) { + dev_err(miphy_dev->dev, + "miphy soft reset control not defined\n"); + return PTR_ERR(miphy_phy->miphy_rst); + } + + err = reset_control_deassert(miphy_phy->miphy_rst); + if (err) { + dev_err(miphy_dev->dev, "unable to bring out of miphy reset\n"); + return err; + } + + return 0; +} + +static int miphy28lp_of_probe(struct device_node *np, + struct miphy28lp_phy *miphy_phy) +{ + struct resource res; + + miphy_phy->osc_force_ext = + of_property_read_bool(np, "st,osc-force-ext"); + + miphy_phy->osc_rdy = of_property_read_bool(np, "st,osc-rdy"); + + miphy_phy->px_rx_pol_inv = + of_property_read_bool(np, "st,px_rx_pol_inv"); + + of_property_read_u32(np, "st,sata-gen", &miphy_phy->sata_gen); + if (!miphy_phy->sata_gen) + miphy_phy->sata_gen = SATA_GEN1; + + if (!miphy28lp_get_ressource_byname(np, "miphy-ctrl-glue", &res)) + miphy_phy->syscfg_miphy_ctrl = res.start; + + if (!miphy28lp_get_ressource_byname(np, "miphy-status-glue", &res)) + miphy_phy->syscfg_miphy_status = res.start; + + if (!miphy28lp_get_ressource_byname(np, "pcie-glue", &res)) + miphy_phy->syscfg_pci = res.start; + + if (!miphy28lp_get_ressource_byname(np, "sata-glue", &res)) + miphy_phy->syscfg_sata = res.start; + + + return 0; +} + +static int miphy28lp_probe(struct platform_device *pdev) +{ + struct device_node *child, *np = pdev->dev.of_node; + struct miphy28lp_dev *miphy_dev; + struct phy_provider *provider; + struct phy *phy; + int chancount, port = 0; + int ret; + + miphy_dev = devm_kzalloc(&pdev->dev, sizeof(*miphy_dev), GFP_KERNEL); + if (!miphy_dev) + return -ENOMEM; + + chancount = of_get_child_count(np); + miphy_dev->phys = devm_kzalloc(&pdev->dev, sizeof(phy) * chancount, + GFP_KERNEL); + if (!miphy_dev->phys) + return -ENOMEM; + + miphy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg"); + if (IS_ERR(miphy_dev->regmap)) { + dev_err(miphy_dev->dev, "No syscfg phandle specified\n"); + return PTR_ERR(miphy_dev->regmap); + } + + miphy_dev->dev = &pdev->dev; + + dev_set_drvdata(&pdev->dev, miphy_dev); + + mutex_init(&miphy_dev->miphy_mutex); + + for_each_child_of_node(np, child) { + struct miphy28lp_phy *miphy_phy; + + miphy_phy = devm_kzalloc(&pdev->dev, sizeof(*miphy_phy), + GFP_KERNEL); + if (!miphy_phy) + return -ENOMEM; + + miphy_dev->phys[port] = miphy_phy; + + phy = devm_phy_create(&pdev->dev, child, &miphy28lp_ops, NULL); + if (IS_ERR(phy)) { + dev_err(&pdev->dev, "failed to create PHY\n"); + return PTR_ERR(phy); + } + + miphy_dev->phys[port]->phy = phy; + miphy_dev->phys[port]->phydev = miphy_dev; + + ret = miphy28lp_of_probe(child, miphy_phy); + if (ret) + return ret; + + ret = miphy28lp_probe_resets(child, miphy_dev->phys[port]); + if (ret) + return ret; + + phy_set_drvdata(phy, miphy_dev->phys[port]); + port++; + + } + + provider = devm_of_phy_provider_register(&pdev->dev, miphy28lp_xlate); + if (IS_ERR(provider)) + return PTR_ERR(provider); + + return 0; +} + +static const struct of_device_id miphy28lp_of_match[] = { + {.compatible = "st,miphy28lp-phy", }, + {}, +}; + +MODULE_DEVICE_TABLE(of, miphy28lp_of_match); + +static struct platform_driver miphy28lp_driver = { + .probe = miphy28lp_probe, + .driver = { + .name = "miphy28lp-phy", + .owner = THIS_MODULE, + .of_match_table = miphy28lp_of_match, + } +}; + +module_platform_driver(miphy28lp_driver); + +MODULE_AUTHOR("Alexandre Torgue "); +MODULE_DESCRIPTION("STMicroelectronics miphy28lp driver"); +MODULE_LICENSE("GPL v2");